Degradation of joint surface morphology, shear behavior and closure characteristics during cyclic loading

作     者：FAN Wen-chen CAO Ping LONG Long 范文臣;曹平;龙龙

作者机构：School of Resources and Safety EngineeringCentral South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal MinesHunan University of Science and TechnologyXiangtan 411201China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2018年第25卷第3期

页      面：653-661页

核心收录：

学科分类：0810[工学-信息与通信工程] 0806[工学-冶金工程] 08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project(51274249)supported by the National Natural Science Foundation of China Project(2015zzts076)supported by the Explore Research Fund for Graduate Students of China Project(201406)supported by the Hunan Key Laboratory of Coal Resources and Safe Mining Open-end Funds,China 

主　　题：rock joint constant normal load condition surface morphology degradation shear behavior joint closure characteristic 

摘      要：In order to investigate the failure mechanism of rock joint,a series of laboratory tests including cyclic direct shear tests under constant normal load(CNL)conditions were *** parameters of the rock joint surface were precisely calculated by means of a three-dimensional laser scanning *** test results were analyzed to investigate the shear behavior and normal displacement behavior of rock joints under CNL *** of rock joint surface during cyclic shear tests was also *** comparison results of the height parameters and the hybrid parameters of the joint surface during cyclic tests show that the degradation of the surface mostly happens in the first shear and the constant normal loads imposed on the joints have significant promotion effects on the morphology *** cyclic shear tests,joints surfaces evolve from rough state to smooth state but keep an overall *** of rock joints degrades with the degradation of joint surface and the increase of normal *** closure deformation of joint is larger than that of the intact rock,and the normal stiffness increases with the increase of shearing times.